HP StorageWorks Enterprise File Services WAN Accelerator - Manual (Page 44)

44 3 - S ETTING U P R EMOTE HP EFS WAN A CCELERATORS
Advanced Options Optimization Policy. Optionally, if you have selected a Fixed Target rule, you can
configure the following types of optimization policies:
• Normal. Perform Lempel-Ziv (LZ) compression and Scalable Data Referencing
(SDR).
• SDR-Only. Perform SDR; do not perform LZ compression.
• Compression-Only. Perform LZ compression; do not perform SDR.
• None. Do not perform SDR or LZ compression.
Setting an optimization policy allows you more flexibility in applying optimization
techniques. For example, if you have a network that requires 45 Mbps or higher with
abundant bandwidth, you do not need to perform LZ compression to obtain maximum
optimization of data. Turning off LZ compression also increases throughput on large
bandwidth networks.
To configure optimization policies for the FTP data channel, define an in-path rule with
the destination port 20 and set its optimization policy. To configure optimization policies
for the MAPI data channel, define an in-path rule with the destination port 7830 and set
its optimization policy. Setting QoS for port 20 on the client-side HP EFS WAN
Accelerator effects passive FTP, while setting the QoS for port 20 on the server-side HP
EFS WAN Accelerator effects active FTP.
VLAN Tag ID. Select the VLAN identification number from the drop-down list to set
the VLAN tag ID. All specifies the rule applies to all VLANs; Untagged specifies the
rule applies to non-tagged connections.
Neural Framing. Optionally, if you have selected a Fixed Target rule, select a neural
framing mode for the in-path rule:
• Never. Never use the Nagle algorithm. All the data is immediately encoded without
waiting for timers to fire or application buffers to fill past a specified threshold. Neural
heuristics are computed in this mode but are not used.
• Always. Always use the Nagle algorithm. All data is passed to the codec which
attempts to coalesce consume calls (if needed) to achieve better fingerprinting. A timer
(6 ms) backs it up and causes leftover data to be consumed. Neural heuristics are
computed in this mode but are not used.
• Transmission Control Protocol (TCP) Hints. This is the default setting which is
based on the TCP hints. If data is received from a partial frame packet or a packet with
the TCP PUSH flag set, the encoder encodes the data instead of immediately
coalescing it. Neural heuristics are computed in this mode but are not used.
• Dynamic. Dynamically adjust the Nagle parameters. In this option, the HP EFS WAN
Accelerator software discerns the optimum algorithm for a particular type of traffic and
switches to the best algorithm based on traffic characteristic changes.
For different types of traffic, one algorithm may be better than others. The considerations
include: latency added to the connection, compression, and SDR performance.
To configure neural framing for the FTP data channel, define an in-path rule with the
destination port 20 and set its optimization policy. To configure neural framing for the
MAPI data channel, define an in-path rule with the destination port 7830 and set its
optimization policy.
Control Description